Apparatus for filtering beer.



No'. 835,122'. PATBNTBD NOV. 6, 1906.

1 J. P. THLURBR.4

a APPARATUS PoR FILTBRING BEER.

APPLICATION FILED FEB.25. 189B.

mm (4v k l gr lll] dm, wieg-V THE Nanni: Pirna: co., wAsHmaroN, n. r:A

UNITED sTATEs PATENT oEEroE.

JACOB F. THEURER, OF MILWAUKEE, WISCONSIN.

APPARATUS FOR FILTERCING BEER.

A State of Wisconsin, have invented certain new and useful Improvements in Apparatus for Filtering specification.

Beer, of which the following is a My present invention relates to improvements in beer-filters. I

The construction of the ap aratus is clearly illustrated in the, annexed rawing, wherein the filter is shown in vertical section, the outer casing being broken away at the center and the upper and lower pans shown separated. The object of the invention `is to provide an improved construction of the filter and to Cause the beer which is to bel treated to pass t'hrou h the iilter in such a course that any gas w ich may become freed from the beer will be reabsorbed thereb the as thus saved, and a superior qua ity of eer obtained. f n

Referring to the drawin A denotes a suitable stand .upon which 1s, mounted the base of the iilterB, which referably is circular in form and provid-ed with la central opening C, from which extends a discharge or outlet pipe C. The base has atV its outer edge an upstanding collar or rim D, to which is securely fastened the shell or casing I E, the upperedge of said casing in turn being directly connected to a comparatively heavy ring or hoop F. A slightly-projecting rim G is formed around the openlng C, and a rubber packing-ring H is placed 1n a depression formed in the base around saidring.

The iiltering bodies are vheld or supported within ans I, said pans having a central hollow oss J, the Abottoms inclming from their outer wallsK toward said boss. The

'bottoms are provided on their upper sides oline downwardly therefrom.

It will be seen that the lower ends of the bosses are slightly contracted, and these contracted ends are of such dimensions as to just Z Specification of Letters Patent.

Application led February 25, 1898. Serial No. 671,601.

Patented Nov. 6, 1906.

fit within the opening C or the upper larger end of the boss of the pan below.

A packing-ring orvgasket O is placed in the base of each pan iaround the lower projecting end of each boss. l

The iiltering medium or` body comprises a mass of compressed ulp P, held between twowire disks Q, which) in turn are between two perforated plates R, the lower one of the plates R resting on the ribs L. All the lterying bodies are alike, being formed from an equal mass of pulp of like consistency compressed to a determinate degree.

Suitable steps are taken to prevent seepage of the liquid between the edges of the mass and the pan, all of which is set forth in detail in Letters Patent N o. 618,965, granted to me under date of February 7, 1899..

The pans are each provided with a series ofV guides or spacing ro]ections S, which extend outwardly from t e walls K and tend to center the pans within the casing, causing the boss of the lower pan to enter the dischargeo ening C andA the lower projecting end of te boss of each succeeding pan toenter the one immediately below it. When the pans are in place, the ribs M of the upper pans bear directl upon the upper disk or plate R ofthe pan be ow, keeping it in place and preventing the pulp from warping or swelling and getting out of place, asl it mlght otherwise do when wet by the passing liquid.

. To keep the mass of the vup er pan in place, to force the pans down tight y one u on the other, and to close up the u peren of the upper boss, a com ression pate or disk T is employed. Said isk has a series of radial ribsA T formed upon its under face, which bear directly upon the erforated disk R immediately below it. t alsohas a series of strengthening-ribs V formed upon its u face, which extend from a central collar to the edge. The collar vW forms the outer wall of a socket X, below which extends a hollow cup Y, the cu fitting `down into thel upper end of the hol ow boss J, as shown, and by reason of the packing-ring Z forms a tight connection therewith and eifectually closes all entrance to the interior of the bosses, except through the passages N.

A cover a extends over the up er end of the casing and is secured thereon y suitable IOO bolts and thumb-nuts b, as shown, a packing- IIO an opening d, into which is secured the inletplpe e, and also with a central opening in which is mounted a screw-stemf, carrying at 1ts lower end a rubber cushion g, which bears against the bottom of cup Y.

Apacking-gland h is provided for the screw, and a nut i, held against endwise mevement by suitable means j, is provided for raising and lowering the screw. After the pans with their filtering elements are placed within the casing and the compression-disk and top have been put in place the screw-stem f 1s forced downward, crowding the pans tightly together one upon the other and the compression-disk upon the upper perforated plate or disk It.

At the same time the rubber cushion g is also compressed, and if when the beer is forced into the filter any bulging of the top should result, due to the pressure exerted, it wlll be compensated for yby the expansion of the rubber cushion and the joints between the other parts kept intact and tight. As the beer comes into the casing from the pipe e 1t passes onto the top of each pan and is forced through the filtering mass contained therein, the clear beer running down the inclined bottom of the pans and discharging into the central bosses through the openings N, whence it passes out through the discharge-pipe C.

In passing beer through a filter a considerable amount of gas is freed therefrom, and heretofore efforts have been made to collect this liberated gas with but little success, I have discovered that by passing the beer in from the top and withdrawing it from the bottom the incoming beer will absorb the liberated gas and also that the filtered beer will absorb any gas which may collect in the hollow bosses J. In this way not only is all the gas saved, but a ner beer results.

While I have shown but two pans in the drawing, it is manifest that any number of pans may be employed, the size of the casing eing varied accordingly; nor do I desire to limit myself to the carrying out of the processin the particular filter herein described, as it is apparent now that the discovery has been made that the process may be carried out in various forms of filters.

I have also found that beer without gas may be entered into the filter along with the requisite amount of free gas and the beer impregnated within the filter with carbonicacid gas to the degree required.

No claim is made herein to the process set forth in this application, as the same is specifically reserved for a divisional application.

Having thus described my invention, what I claim is- 1. In a filter, the combination of a shell or housing; a filtering medium contained therein; a cover; a compression-plate for the filtering medium; and an expansible device held between said plate and cover, whereby when internal pressure is exerted upon the cover by the incoming fluid its outward fiexure will be compensated for, substantially as described.

2. In a filter, the combination of a shell or housing; an outlet-opening formed therein; a filtering medium having a discharge-passage designed to fit Within said opening; a compression plate bearing upon the opposite side of said filtering medium; a cover; and an eXpansible device held between said cover and the compression-plate, substantially as and for the purpose described.

3. In a filter, the combination of a shell or housing; an outlet-opening formed therein; a pan having a hollow central boss the lower end of which fits within the outlet-opening a mass of compressed pulp within said pan; a compression-plate having a series of ribs upon its under face; a central depending cup Y designed to fit within the upper end of the boss; a cover; a screw-stem passing through the cover and having at its lower end a yielding cushion bearing in the cup; and an inletopening.

4. In a filter, the combination of a shell or housing; a central outlet-opening C formed in the base thereof; a series of pans having central hollow bosses J and ribs M formed upon their under faces; a compression-plate T having ribs upon its under face, and a central depending cup Y; a cover; a screw-stem f mounted in said cover and carrying at its lower end a yielding cushion g; and an inletopening.

5. In a filter, the combination of a shell or housing provided with inlet and discharge openings; a series of pans supported therein, the bottom of each pan inclining toward a discharge-outlet formed therein; and a series of ribs carried by the under face of each pan, the outer edges of said ribs bearing upon the upper face of the adjacent filter element, substantially as described.

In witness whereof I hereunto set my hand in the presence of two Witnesses.

JACOB F. THEURER.

Witnesses:

RICHARD BIRKHOLZ, E. P. SCHMITT.

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